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Add crc32 instruction and intrinsics. Add a new class of prefix

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bytes for F2 0F 38 and propagate. Add a FIXME for a set
of possibilities which correspond to intrinsics already used.

New test.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78508 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher 2009-08-08 21:55:08 +00:00
parent 46151de6a0
commit b4dc13cab7
6 changed files with 131 additions and 0 deletions
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5
lib/Target/X86/X86CodeEmitter.cpp
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@ -517,6 +517,10 @@ void Emitter<CodeEmitter>::emitInstruction(
case X86II::TA: // 0F 3A
Need0FPrefix = true;
break;
case X86II::TF: // F2 0F 38
MCE.emitByte(0xF2);
Need0FPrefix = true;
break;
case X86II::REP: break; // already handled.
case X86II::XS: // F3 0F
MCE.emitByte(0xF3);
@ -548,6 +552,7 @@ void Emitter<CodeEmitter>::emitInstruction(
MCE.emitByte(0x0F);
switch (Desc->TSFlags & X86II::Op0Mask) {
case X86II::TF: // F2 0F 38
case X86II::T8: // 0F 38
MCE.emitByte(0x38);
break;

6
lib/Target/X86/X86InstrFormats.td
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@ -79,6 +79,7 @@ class XD { bits<4> Prefix = 11; }
class XS { bits<4> Prefix = 12; }
class T8 { bits<4> Prefix = 13; }
class TA { bits<4> Prefix = 14; }
class TF { bits<4> Prefix = 15; }
class X86Inst<bits<8> opcod, Format f, ImmType i, dag outs, dag ins,
string AsmStr>
@ -229,6 +230,11 @@ class SS428I<bits<8> o, Format F, dag outs, dag ins, string asm,
list<dag> pattern>
: I<o, F, outs, ins, asm, pattern>, T8, Requires<[HasSSE42]>;
// SS42FI - SSE 4.2 instructions with TF prefix.
class SS42FI<bits<8> o, Format F, dag outs, dag ins, string asm,
list<dag> pattern>
: I<o, F, outs, ins, asm, pattern>, TF, Requires<[HasSSE42]>;
// X86-64 Instruction templates...
//

7
lib/Target/X86/X86InstrInfo.cpp
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@ -2931,6 +2931,10 @@ static unsigned GetInstSizeWithDesc(const MachineInstr &MI,
case X86II::TA: // 0F 3A
Need0FPrefix = true;
break;
case X86II::TF: // F2 0F 38
++FinalSize;
Need0FPrefix = true;
break;
case X86II::REP: break; // already handled.
case X86II::XS: // F3 0F
++FinalSize;
@ -2966,6 +2970,9 @@ static unsigned GetInstSizeWithDesc(const MachineInstr &MI,
case X86II::TA: // 0F 3A
++FinalSize;
break;
case X86II::TF: // F2 0F 38
++FinalSize;
break;
}
// If this is a two-address instruction, skip one of the register operands.

3
lib/Target/X86/X86InstrInfo.h
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@ -321,6 +321,9 @@ namespace X86II {
// T8, TA - Prefix after the 0x0F prefix.
T8 = 13 << Op0Shift, TA = 14 << Op0Shift,
// TF - Prefix before and after 0x0F
TF = 15 << Op0Shift,
//===------------------------------------------------------------------===//
// REX_W - REX prefixes are instruction prefixes used in 64-bit mode.

72
lib/Target/X86/X86InstrSSE.td
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@ -3678,3 +3678,75 @@ def : Pat<(v2i64 (X86pcmpgtq VR128:$src1, VR128:$src2)),
(PCMPGTQrr VR128:$src1, VR128:$src2)>;
def : Pat<(v2i64 (X86pcmpgtq VR128:$src1, (memop addr:$src2))),
(PCMPGTQrm VR128:$src1, addr:$src2)>;
// crc intrinsic instruction
// This set of instructions are only rm, the only difference is the size
// of r and m.
let Constraints = "$src1 = $dst" in {
def CRC32m8 : SS42FI<0xF0, MRMSrcMem, (outs GR32:$dst),
(ins GR32:$src1, i8mem:$src2),
"crc32 \t{$src2, $src1|$src1, $src2}",
[(set GR32:$dst,
(int_x86_sse42_crc32_8 GR32:$src1,
(load addr:$src2)))]>, OpSize;
def CRC32r8 : SS42FI<0xF0, MRMSrcReg, (outs GR32:$dst),
(ins GR32:$src1, GR8:$src2),
"crc32 \t{$src2, $src1|$src1, $src2}",
[(set GR32:$dst,
(int_x86_sse42_crc32_8 GR32:$src1, GR8:$src2))]>,
OpSize;
def CRC32m16 : SS42FI<0xF1, MRMSrcMem, (outs GR32:$dst),
(ins GR32:$src1, i16mem:$src2),
"crc32 \t{$src2, $src1|$src1, $src2}",
[(set GR32:$dst,
(int_x86_sse42_crc32_16 GR32:$src1,
(load addr:$src2)))]>,
OpSize;
def CRC32r16 : SS42FI<0xF1, MRMSrcReg, (outs GR32:$dst),
(ins GR32:$src1, GR16:$src2),
"crc32 \t{$src2, $src1|$src1, $src2}",
[(set GR32:$dst,
(int_x86_sse42_crc32_16 GR32:$src1, GR16:$src2))]>,
OpSize;
def CRC32m32 : SS42FI<0xF1, MRMSrcMem, (outs GR32:$dst),
(ins GR32:$src1, i32mem:$src2),
"crc32 \t{$src2, $src1|$src1, $src2}",
[(set GR32:$dst,
(int_x86_sse42_crc32_32 GR32:$src1,
(load addr:$src2)))]>, OpSize;
def CRC32r32 : SS42FI<0xF1, MRMSrcReg, (outs GR32:$dst),
(ins GR32:$src1, GR32:$src2),
"crc32 \t{$src2, $src1|$src1, $src2}",
[(set GR32:$dst,
(int_x86_sse42_crc32_32 GR32:$src1, GR32:$src2))]>,
OpSize;
def CRC64m64 : SS42FI<0xF0, MRMSrcMem, (outs GR64:$dst),
(ins GR64:$src1, i64mem:$src2),
"crc32 \t{$src2, $src1|$src1, $src2}",
[(set GR64:$dst,
(int_x86_sse42_crc32_64 GR64:$src1,
(load addr:$src2)))]>,
OpSize, REX_W;
def CRC64r64 : SS42FI<0xF0, MRMSrcReg, (outs GR64:$dst),
(ins GR64:$src1, GR64:$src2),
"crc32 \t{$src2, $src1|$src1, $src2}",
[(set GR64:$dst,
(int_x86_sse42_crc32_64 GR64:$src1, GR64:$src2))]>,
OpSize, REX_W;
// TODO: These correspond to int_x86_sse42_crc32_8 but with a 64-bit src
// and dest, figure it out.
//def CRC64m8 : SS42FI<0xF1, MRMSrcMem, (outs GR64:$dst),
// (ins GR32:$src1, i8mem:$src2),
// "crc32 \t{$src2, $src1|$src1, $src2}",
// [(set GR64:$dst,
// (int_x86_sse42_crc32_8 GR64:$src1,
// (load addr:$src2)))]>,
// OpSize, REX_W;
//def CRC64r8 : SS42FI<0xF1, MRMSrcReg, (outs GR64:$dst),
// (ins GR64:$src1, GR8:$src2),
// "crc32 \t{$src2, $src1|$src1, $src2}",
// [(set GR64:$dst,
// (int_x86_sse42_crc32_8 GR32:$src1, GR8:$src2))]>,
// OpSize, REX_W;
}

38
test/CodeGen/X86/sse42.ll Normal file
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@ -0,0 +1,38 @@
; RUN: llvm-as < %s | llc -mtriple=i686-apple-darwin9 -mattr=sse42 | FileCheck %s -check-prefix=X32
; RUN: llvm-as < %s | llc -mtriple=x86_64-apple-darwin9 -mattr=sse42 | FileCheck %s -check-prefix=X64
declare i32 @llvm.x86.sse42.crc32.8(i32, i8) nounwind
declare i32 @llvm.x86.sse42.crc32.16(i32, i16) nounwind
declare i32 @llvm.x86.sse42.crc32.32(i32, i32) nounwind
define i32 @crc32_8(i32 %a, i8 %b) nounwind {
%tmp = call i32 @llvm.x86.sse42.crc32.8(i32 %a, i8 %b)
ret i32 %tmp
; X32: _crc32_8:
; X32: crc32 8(%esp), %eax
; X64: _crc32_8:
; X64: crc32 %sil, %eax
}
define i32 @crc32_16(i32 %a, i16 %b) nounwind {
%tmp = call i32 @llvm.x86.sse42.crc32.16(i32 %a, i16 %b)
ret i32 %tmp
; X32: _crc32_16:
; X32: crc32 8(%esp), %eax
; X64: _crc32_16:
; X64: crc32 %si, %eax
}
define i32 @crc32_32(i32 %a, i32 %b) nounwind {
%tmp = call i32 @llvm.x86.sse42.crc32.32(i32 %a, i32 %b)
ret i32 %tmp
; X32: _crc32_32:
; X32: crc32 8(%esp), %eax
; X64: _crc32_32:
; X64: crc32 %esi, %eax
}